Variable air access films
US9447987B1 · kind B1 · utility
3Cited by
5References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 30, 2014 |
| Grant date | Sep 20, 2016 |
| Priority date | — |
| Expiry date | Apr 28, 2035 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF23L13/00
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A variable air access mechanism and method of varying air access comprising a first film with a predetermined amount of total air access openings to be formed by removal of laser cut chads; a portion of the chads only partially cut; and a second film adhered to the first film wherein removal of the second film in a first direction opens all of the air access openings or removal of the second film in an opposing direction leaves the partially cut chads attached to the first film such that only selected chads are removed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.